Pipe-threading machine.



of M. FOSTER.

PIPEl THBEADING MACHINE.

\ APPLIUTIN FILED PEB. 2B, 1907. 922, 120, Patented May 1a, 1909.

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PIPE THBEADING MACHINE.

AIPLIOATIOI I'ILBD PEB. 2B. 1007.

'922, 120. Patented May 18. 1909,

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WITNESSES INVEIITR OM 221. wir

Q@ H Ba y UNITED STATES PATENT OFFICE.

CASSIUS M. FOSTER, OF TOLEDO, OHIO, SSIGNOR TO THE TOLEDO PIPE THREADNG MACHINE COMPANY, Oi TOLEDO, OHIO, A CORPORATION OF OHIO.

PIPE-THREADING MACHINE.

Speutlisationv of Letters Xateut.

Patented May 18, 1909.

Applicationnled February 28, 1907. Serial No. 359,742.

, My invention relates to pipe threading machinas, articularly to 'that type thereof, in which t e threading dies gradually move away from the axis ofthe pipe during the threading operation. This n'iakes the pipe with the threads gradually 'deeper toward the ends, so 4that the latter will become tightly wedgpd in the sli htly flaring female member of t e pipe coup 1ng, and so produce a gas and water tight joint.

The object of 4the present invention is to provide a machine of the `character describedwhich will accurately and 'automatcally`vary the radial.' position of the'dies for the purposes stated, and which will preferably be power operated and provide with various safe'ty devices and other accessories,

,as hereinafter described.

Referring to the drawings, Figure 1 is a side elevation of one form of my invention, portions being broken away and made in section in order to show the normally concealed arts; Fig. 2, a section on the line 2-2 of igs. 1 and Lia-portion being broken away; Fig. 3, a section on the line,3'-3 of Fig. 2; Fig. 4, a detail vertical section through a ortion of my machine, on the line 4-4 of ig.Y

1; Figs. 5 and 6, sections on the lines 5-5 and 6-6, respectively, of Fig. 4; Figi .7, a detail of the catch for holding the sectional feed nut in coperative relatlon to the feed screw; Fig. V8, a section showing the gearing employed; and Fig. 9, a section of Fr. 1 on the line 9-9, parts` to theright of the ead 4 being omitted. u

On the drawings .1' designates the bed or frame of the maciine, and 2, 2, vertical housings s aced` a art and containinglbearings fort e chuc barrel 3, which as at each end beyond the housin s a chuck-head 4. The chuck-heads may e made as desired, ibut I haveshown for the urpose 0f illustration merely, the 'oft-hand ead with the radially-actingl dogs 5, movable into contact with, and awayfrom-the` ipgb'y the ao'- of the screws '7 whic are secured to the co, ars 8 in the slots 9 in thehead 4. The

screws 7 may lac-turned by ap lying a v vrenh or handle to their squared en( s'10,"wh1ch extendout through the eri hery of the head. The right-hand chuck ea may be similarly or otherwise constructed.

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11 is the drivingulley which with the' r glars 13 and 14 is seeved on the drivings aft 12. The two spur-gears 15 and 16 are secured to the shaft 12. '[he gears 13, 14, 15, and 16 are of increasing diameter in the order named, the rst two constituting one pair, and the remaining two, another pair.

he shaft '17, parallel with the shaft 11, has.

slidingly mounted thereon two independently movable pairs of gears, one pair 18 and 19'coperating with gears 14 and 13, respectively, and the pair 20 and 21 cooperating with the gears 15 and 16, respectively. The,

pairs of ears 18, 19, 20, and 21 are splined to the sh t 17 so as to' rotate therewith. The pair 1.3 and 14 is spaced farther apart than the pair 18 and 19, so that, when the gears 14 and 1B are in mesh as shown, the gears 13 and 19 will be out of mesh, and so that, when the gears 16 and 21 are,in niesh, as shown, the

ears 15 and 20 are out of mesh, it being nnr erstood that the gears 18 and 19 are rigidly secured together; that the gears 20 and 21 arealso secured together; and that the gears 13 and 14 are secured to ether rigidly with the pulley 1-1. The pair o gears 18 and 19 is slid on the shaft 17 by the handle '22, and the pair of gears 20 and 21, by the handle 23, the

andles being onthe rock shafts 22 and 23 connected' to the collars carrying the said The-right hand end of the shaft 12.has secured thereon the spur-gear 2 4 which meshes with the gear 2 6 ontheright hand end of the barrel 3', so that when the shaft 12` is rotated the barrel 3 and .the chuck-heads 4 are ro- 490 paix-s ofgears by the forked'arms 22' and 23.

tated. The shaft 12 has at its Left hand end the pinion 28 which meshes with the spurgear-29, rigid with the pinionBO. The latter meshes with the ye ur ear 31, which is securedto the left an e'nd of the lead screw 27.

35 re resiente the carriage whichup ertsl the diecad 36 and has travel'towar and awa ,from the right-hand chuck by means of t esectional'nut 37 carried by the carriage and co erating with the screw 27. The nut is m e in halves, each half carry*` ing alpin 3.8. A disk 39 is centrally ivo on the pivot or screw 40, secured in t e two nanges 41 and 42 depending from the bottorn of the carriage bed, the disk being between said flanges. The d isk has at opposite sides of its center the parallel slots 43, extending in opposite directions so that, as the disk is turned to the left from the position shown in Fig. 3, the pins 3S will travel away from each other and disengage the nut sections from the screw 27. The disk 39 is actuated to closethe nut sections by means of the handle: 44.4 The disk is locked in the position shown in Fig. 3, which is the, posi*- tion in which the nut sections are in engagement with the screw 27, as shown in Fig. 2, .by theoatch or trigger 45, secured to the rock-shaft 46.

47 is a handle on the shaft 46, by which the trig er may be actuated.

The isk 39 has an arm 48 which, when the disk is as shown in Fig. 3, rests on the hook or shoulder 49 on the lower end of theV trigger. The spring 50 secured to the handle 44 and a lixed support moves the disk toward the left when the trigger releases thearm 48.

The flange 42 has the slots 51to permit the travel of the pins 38 when opening or closing the nut sections.

The diesh'ead 36: has a. number of radial ways. 52, in each of whichV slides a die carrier 53 holding a threadi die 54. l

The die-holders carry orward projecting pins 55, which extend into the `diagonal slots 56 in the rin or annular plate 57, loosely mounted in t e die-head 36. The slots 56 are dia onal relative to the direction of travel o the die-carriers. The' die-head has the cover plate 58, which fits overl the plate 57 and hasthe hub 59. within the Vplate 57 to form a bearing for the latter. he ring carries a projecting roller 60 which travels-,in the cam-slot 61 in the cam-plate 62 on the upper ed e of the bracket63. The righthand en of the cam-slot gradually rises toward the leftfor a short distance as shown at 64 and then the inclination suddenly increases as shown at 65 and then the slot extends to the left for a short distance substantially'parallel with the pipe 6.

The foot of the bracket63 is secured to the top of the. bed 1 by means ofl the bolt 66 having its head in the undercut' groove 467 therein. AOn the bed 1 I place the spacing block 68 set in the slot 69 in the carra e, the block-being thicker than the base of t e cara e as shown in Fi 4; The'exteriorly threa ed sleeve 70 is sli on the bolt 66 above the block 68 and is held thereon4 by the nuts 71. The sleeve is prevented from rotation by having Opening in in Fig. 6. The nut 72 works on the threadsj on the sleeve 70, 4bears on the foot .of the bracket 63, as shown in Fig. 4 and is provided with the handle 73an'd t Ae lug 74 extending into the slot 75 in the bracket 63.

in order to bac its lower square end in a s, uare'. the hole of the bracket as s own son,-the other isout oforder.

76 is a tri )ping block secured to the die carriage an adapted to engage with the lug 74 in case the i'eed of the carriage is not stopped soon enough, as will be explained.

he under sido of tliebed l is provided with the rack 77, meshing with the pinion 78 on the shaft 7'9 mounted in the side plato 80 on the carriage 35. The shaft 7u is iotated by the hand wheel 81, when the nut 37 is out of engagement with the screw 27, oil the carriage and make adjustments thereof more quickly than the rotation of the screw would permit.

The disk 57 is provided with the lug 82 which carries the screw 83, arranged to contact, on certain conditions, with the upper end of the tri ger 45 and release the arm 48 therefrom, as iereinafter described.

The operation is as follows: The carriage beingl moved to the right till the roller 60 is at the right-hand end of the cam-slot 6l, the nutsections being closed on the screw 27 and locked by the trigger 45, and the pipe 6 being secured 1n the chucks 4 with one end thereof about to be engagled by the dies 54, power is then applied to t e ulley 11 to set the machine m motion. e speeds of rotation of the chucks and the screw 27 have previously been set so as to cause the pipe'te rotate and the die-head carriage to travel, in order to cut in the pipe the thread -having the pitch desired. As the carriage moves to the left the roller 60 gradually rises on the incline 64 ofthe cam slot 61 and causes the plate 57 4outwardly gradually, so that the threadwill gradually become shallower as the thread@ lng operation vroceeds. When the roller reaches the inc 111e 65, the thread should bey cut the desired distance from the end of the pipe. The roller 60 then rides `up the said incline 65quickly, causing the dies 54 to be withdrawn clear of the pipe. The handle 47 may then ,be swung to withdraw the trigger 45 from the arm 48 whereu on the spring 50 swin s the cam disk 39 to t e left on Fig. 8, whic causes the disengagement of the sections oi' the nut 37 from the lead-screw 27. 1n case the handle 47 should not be operated as soon as the operation is 'completed the screw 83 will engage the upper end of the trigger and camminate 39, and the block 76 will engage the flug 74and loosen the nut 72, thus permitting tlie bracket to move with ,the car- -riage 1n case the roller should engage the left-hand of the .slot 61. These two safety devices may be used alone, or together; in the latter case one will act when, for any rea- As -soon as the nut sections have been o ened the hand wheel 81 is rotated tobae oil the carriage preparatory to another threading operation.

ilo

cause the latter to release the esame I provino several brackets G3 having tho cam slot 61 constructed With dilcrent lengthsV and inclines so as to provide for dil"- ferent lengths and pitches of thc thread. These brackets may be exchanfrcd one for another very quickly, as is readilrT apparent.

The inclinations of the cam-slot G1 are inclined from the planes including the cuttinor ends of the dies and the axis of the die head.

While I have minutely described my invention, I do not desire to be limited to the precise elements or combinations shown, as many modifications may be made While retaining the principles disclosed.

I claim- 1. In a pipe threadingmachine, a traveling die-head, a screw for causing the die-head to travel, a sectional nut carried by said diehead, means for moving the nut i-nto engagement with said screw, a trigger for lockxn,

said nut-moving means, a rotary trip carrie by said head for tri pin the trigger at the completion of the t rea ing operation, and

means for retracting the nut from the screw when the trigger has been tripped.

2. In a pipe threading machine, a traveling die-head, a screw for causing the die-head to sa predetermined travel, a sectional nut carried by said dielicad, means for moving thf` nut into engagement with said screw', a trigger for locking said nut-moving means, a rotary trip carried by said head for tripping the trigger at the completion of the threading operation manually o erated moans for tripping sai trigger, an: means for retracting the nut from the screw when the trigger has been tripped. 3. In a pipe threading machine, a bedplate, a traveling die-head thereon, a cam late, means coperable with the cam-plate or controlling the position of the dies relative to the axis of said die-head means for securing the carn late to the be late, and means controlled y the die-head or releasing the connection between the bed-plate and the cam-plate when the die-head reaches position with respect to the cam-plate'.

Signed at Toledo, Ohio this 23rd day of February 1907.

" CASSIUS M. FOSTER.

Witnesses:

A. M. STEWART, G. W. WELLS. 

